// Copyright 2024 The Devstar Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package setting

import (
	"io"
	"net/http"
	"strings"

	appstore_model "code.gitea.io/gitea/models/appstore"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/templates"
	"code.gitea.io/gitea/services/appstore"
	"code.gitea.io/gitea/services/context"
)

const (
	tplSettingsAppStore templates.TplName = "user/settings/appstore"
)

// AppStore displays the app store page
func AppStore(ctx *context.Context) {
	ctx.Data["Title"] = ctx.Tr("settings.appstore")
	ctx.Data["PageIsSettingsAppStore"] = true
	ctx.HTML(http.StatusOK, tplSettingsAppStore)
}

// AppStoreAPI handles API requests for app store data
func AppStoreAPI(ctx *context.Context) {
	action := ctx.PathParam("action")

	switch action {
	case "apps":
		handleGetApps(ctx)
	case "categories":
		handleGetCategories(ctx)
	case "tags":
		handleGetTags(ctx)
	default:
		ctx.JSON(http.StatusBadRequest, map[string]interface{}{
			"error": "Invalid action",
		})
	}
}

// handleGetApps returns the list of apps from database
func handleGetApps(ctx *context.Context) {
	// Get query parameters
	category := ctx.FormString("category")
	tag := ctx.FormString("tag")
	search := ctx.FormString("search")
	deployment := ctx.FormString("deployment") // docker, kubernetes, all
	source := ctx.FormString("source")         // local | devstar

	manager := appstore.NewManager(ctx)

	var apps []appstore.App
	var err error

	if source == "devstar" {
		apps, err = manager.ListAppsFromDevstar()
		if err == nil {
			// 与本地一致的过滤逻辑（先拿全量，再在服务端筛选）
			if category != "" || tag != "" || search != "" || deployment != "" {
				var filtered []appstore.App
				for _, a := range apps {
					if category != "" && a.Category != category {
						continue
					}
					if tag != "" {
						matched := false
						for _, t := range a.Tags {
							if t == tag {
								matched = true
								break
							}
						}
						if !matched {
							continue
						}
					}
					if deployment != "" && deployment != "all" {
						// 处理部署类型过滤，包括 'both' 类型
						appDeployment := a.DeploymentType
						if appDeployment == "" {
							// 如果没有 deployment_type 字段，尝试从其他字段获取
							if a.Deploy.Type != "" {
								appDeployment = a.Deploy.Type
							} else {
								appDeployment = "docker" // 默认值
							}
						}

						if appDeployment != "both" && appDeployment != deployment {
							continue
						}
					}
					if search != "" {
						low := strings.ToLower(search)
						nameOk := strings.Contains(strings.ToLower(a.Name), low)
						descOk := strings.Contains(strings.ToLower(a.Description), low)
						authorOk := strings.Contains(strings.ToLower(a.Author), low)
						if !(nameOk || descOk || authorOk) {
							continue
						}
					}
					filtered = append(filtered, a)
				}
				apps = filtered
			}
		}
	} else {
		if search != "" {
			// Convert tag parameter to tags slice
			var tags []string
			if tag != "" {
				tags = strings.Split(tag, ",")
			}
			apps, err = manager.SearchApps(search, category, tags)
		} else {
			apps, err = manager.ListApps()

			// Filter by category, tag and deployment if specified
			if category != "" || tag != "" || deployment != "" {
				var filteredApps []appstore.App
				for _, app := range apps {
					matchCategory := category == "" || app.Category == category
					matchTag := tag == ""
					if tag != "" {
						for _, appTag := range app.Tags {
							if appTag == tag {
								matchTag = true
								break
							}
						}
					}

					// 处理部署类型过滤，包括 'both' 类型
					matchDeployment := deployment == "" || deployment == "all"
					if deployment != "" && deployment != "all" {
						appDeployment := app.DeploymentType
						if appDeployment == "" {
							// 如果没有 deployment_type 字段，尝试从其他字段获取
							if app.Deploy.Type != "" {
								appDeployment = app.Deploy.Type
							} else {
								appDeployment = "docker" // 默认值
							}
						}

						matchDeployment = appDeployment == "both" || appDeployment == deployment
					}

					if matchCategory && matchTag && matchDeployment {
						filteredApps = append(filteredApps, app)
					}
				}
				apps = filteredApps
			}
		}
	}

	if err != nil {
		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
			"error": err.Error(),
		})
		return
	}

	ctx.JSON(http.StatusOK, map[string]interface{}{
		"apps": apps,
	})
}

// handleGetCategories returns the list of categories
func handleGetCategories(ctx *context.Context) {
	categories, err := appstore_model.GetCategories(ctx)
	if err != nil {
		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
			"error": err.Error(),
		})
		return
	}

	ctx.JSON(http.StatusOK, map[string]interface{}{
		"categories": categories,
	})
}

// handleGetTags returns the list of tags
func handleGetTags(ctx *context.Context) {
	tags, err := appstore_model.GetTags(ctx)
	if err != nil {
		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
			"error": err.Error(),
		})
		return
	}

	ctx.JSON(http.StatusOK, map[string]interface{}{
		"tags": tags,
	})
}

// AppStoreInstall handles app installation
func AppStoreInstall(ctx *context.Context) {
	if ctx.Req.Method != "POST" {
		ctx.JSON(405, map[string]string{"error": "Method Not Allowed"})
		return
	}

	// 解析表单数据
	appID := ctx.FormString("app_id")
	configJSON := ctx.FormString("config")
	installTarget := ctx.FormString("install_target")
	kubeconfig := ctx.FormString("kubeconfig")
	kubeconfigContext := ctx.FormString("kubeconfig_context")

	if appID == "" {
		ctx.JSON(400, map[string]string{"error": "应用ID不能为空"})
		return
	}

	// 创建 manager 并执行安装
	manager := appstore.NewManager(ctx)
	if err := manager.InstallApp(appID, configJSON, installTarget, kubeconfig, kubeconfigContext); err != nil {
		// 根据错误类型返回相应的状态码和消息
		if appErr, ok := err.(*appstore.AppStoreError); ok {
			switch appErr.Code {
			case "APP_NOT_FOUND", "CONFIG_MERGE_ERROR":
				ctx.JSON(400, map[string]string{"error": appErr.Message + ": " + appErr.Details})
			case "KUBERNETES_INSTALL_ERROR":
				ctx.JSON(500, map[string]string{"error": appErr.Message + ": " + appErr.Details})
			case "NOT_IMPLEMENTED":
				ctx.JSON(501, map[string]string{"error": appErr.Message})
			default:
				ctx.JSON(500, map[string]string{"error": appErr.Message})
			}
		} else {
			ctx.JSON(500, map[string]string{"error": "安装失败: " + err.Error()})
		}
		return
	}

	// 安装成功
	if installTarget == "kubeconfig" && kubeconfig != "" {
		ctx.Flash.Success("应用已成功安装到外部 Kubernetes 集群")
	} else {
		ctx.Flash.Success("应用配置已准备完成，本地安装功能开发中")
	}

	ctx.Redirect(setting.AppSubURL + "/user/settings/appstore")
}

// AppStoreUninstall handles app uninstallation
func AppStoreUninstall(ctx *context.Context) {
	if ctx.Req.Method != "POST" {
		ctx.JSON(405, map[string]string{"error": "Method Not Allowed"})
		return
	}

	// 解析表单数据
	appID := ctx.FormString("app_id")
	installTarget := ctx.FormString("install_target")
	kubeconfig := ctx.FormString("kubeconfig")
	kubeconfigContext := ctx.FormString("kubeconfig_context")

	if appID == "" {
		ctx.JSON(400, map[string]string{"error": "应用ID不能为空"})
		return
	}

	// 创建 manager 并执行卸载
	manager := appstore.NewManager(ctx)
	if err := manager.UninstallApp(appID, installTarget, kubeconfig, kubeconfigContext); err != nil {
		// 根据错误类型返回相应的状态码和消息
		if appErr, ok := err.(*appstore.AppStoreError); ok {
			switch appErr.Code {
			case "APP_NOT_FOUND":
				ctx.JSON(400, map[string]string{"error": appErr.Message + ": " + appErr.Details})
			case "KUBERNETES_UNINSTALL_ERROR":
				ctx.JSON(500, map[string]string{"error": appErr.Message + ": " + appErr.Details})
			case "NOT_IMPLEMENTED":
				ctx.JSON(501, map[string]string{"error": appErr.Message})
			default:
				ctx.JSON(500, map[string]string{"error": appErr.Message})
			}
		} else {
			ctx.JSON(500, map[string]string{"error": "卸载失败: " + err.Error()})
		}
		return
	}

	// 卸载成功
	if installTarget == "kubeconfig" && kubeconfig != "" {
		ctx.Flash.Success("应用已成功从外部 Kubernetes 集群卸载")
	} else {
		ctx.Flash.Success("本地卸载功能开发中")
	}

	ctx.Redirect(setting.AppSubURL + "/user/settings/appstore")
}

// AppStoreConfigure handles app configuration
func AppStoreConfigure(ctx *context.Context) {
	// TODO: Load app configuration form
	ctx.Data["Title"] = "App Configuration"
	ctx.Data["PageIsSettingsAppStore"] = true
	ctx.HTML(http.StatusOK, tplSettingsAppStore)
}

// AppStoreConfigurePost handles app configuration form submission
func AppStoreConfigurePost(ctx *context.Context) {
	// TODO: Handle configuration form submission
	ctx.Flash.Success("App configuration feature coming soon")
	ctx.Redirect(setting.AppSubURL + "/user/settings/appstore")
}

// 添加应用API
func AddAppAPI(ctx *context.Context) {
	manager := appstore.NewManager(ctx)
	if ctx.Req.Method != "POST" {
		ctx.JSON(405, map[string]string{"error": "Method Not Allowed"})
		return
	}
	defer ctx.Req.Body.Close()
	jsonBytes, err := io.ReadAll(ctx.Req.Body)
	if err != nil {
		ctx.JSON(400, map[string]string{"error": "读取请求体失败"})
		return
	}
	if err := manager.AddAppFromJSON(jsonBytes); err != nil {
		ctx.JSON(400, map[string]string{"error": err.Error()})
		return
	}
	ctx.JSON(200, map[string]string{"msg": "ok"})
}